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Share-based compensation (Tables) | 12 Months Ended
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Dec. 31, 2012
Share-Based Compensation [Abstract] |
Weighted-average assumptions used in determining the fair value of share based awards | The Company determines the fair value of share based awards at the grant date by using the Black-Scholes option-pricing model, and is incorporating the simplified method to compute expected lives of share based awards with the following weighted-average assumptions:
Years Ended December 31, |  | 2012 |  |  | 2011 |
Assumptions |  |  |  |  |  |
Dividend yield |  |  | 0 | % |  |  | 0 | %
Risk free interest rate |  |  | 1.0 | % |  |  | 1.0 | %
Expected volatility |  |  | 73 | % |  |  | 63 | %
Expected lives |  |  | 5 years |  |  |  | 5 years
Summary of the Status of the Company's Stock Option Plan | A summary of the status of the Company's Plans as of December 31, 2012 and 2011 and changes for the periods ending on those dates is presented below:
Stock Option Plan Totals |  | Shares |  |  | Weighted Average Exercise Price |
Outstanding at December 31, 2010 |  |  | 3,411,943 |  |  | $ | 1.23 |
· Cancelled |  |  | (49,000 | ) |  | $ | 2.04 |
· Exercised |  |  | (2,500 | ) |  | $ | 1.12 |
· Granted |  |  | 75,000 |  |  | $ | 1.31 |
Outstanding at December 31, 2011 |  |  | 3,435,443 |  |  | $ | 1.22 |
· Cancelled |  |  | (8,313 | ) |  | $ | 1.10 |
· Exercised |  |  | (109,038 | ) |  | $ | 1.42 |
· Granted |  |  | 30,843 |  |  | $ | 3.27 |
Outstanding at December 31, 2012 |  |  | 3,348,935 |  |  | $ | 1.23
Weighted Average Contractual Life and Exercise Price | The following is the weighted average contractual life in years and the weighted average exercise price at December 31, 2012 of:
|  |  |  |  | Weighted Average |  |  |
|  | Number of |  |  | Remaining |  | Weighted Average |
|  | Options |  |  | Contractual Life |  | Exercise Price |
Options outstanding |  |  | 3,348,935 |  |  | 4.8 years |  | $ | 1.23 |
Options vested |  |  | 3,348,935 |  |  | 4.8 years |  | $ | 1.23 |
Intrinsic value | The following is the intrinsic value at December 31, 2012 of:
Options outstanding |  | $ | 8,062,564 |
Options vested in 2012 |  |  | 29,862 |
Options exercised in 2012 |  |  | 267,000 |
Weighted Average Fair Value | The following is the weighted average fair value for the twelve month period ended December 31, 2012 of:
Options granted |  | $ | 3.27 |
Options vested |  | $ | 2.86 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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